<template>
  <div>
    <div class="pd-10">
      <el-input style="width: 200px" placeholder="请输入名称" suffix-icon="el-icon-search" v-model="name"></el-input>
      <el-button class="ml-5" type="primary" @click="load">搜索</el-button>
      <el-button class="ml-5" type="warning" @click="reset">重置</el-button>
    </div>

    <div class="mg-10">
        <el-button type="primary" class="ml-5" @click="dialogFormVisible=!dialogFormVisible">新增音乐<i class="el-icon-top ml-5"></i></el-button>
      <el-popconfirm
          confirm-button-text='是的我确定'
          cancel-button-text='算了在想想'
          icon="el-icon-info"
          icon-color="red"
          title="您确定删除吗？"
          @confirm="delBatch"
          class="ml-5"
      >
        <el-button type="danger" slot="reference">批量删除<i class="el-icon-remove-outline ml-5"></i></el-button>
      </el-popconfirm>


    </div>

    <el-table
        :data="tableData" border stripe
        :header-cell-style="{ background:'#eee',border: '1px solid #ccc' ,color: '#000'}"
        @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55">
      </el-table-column>
      <el-table-column prop="id" label="id" width="100px">
      </el-table-column>
      <el-table-column prop="name" label="音乐名称" width="200">
      </el-table-column>
      <el-table-column prop="author" label="作者" width="200">
      </el-table-column>
      <el-table-column prop="coverImg" label="音乐封面" >
        <template slot-scope="scope">
          <el-empty description="音乐封面" :image="scope.row.coverImg"></el-empty>
        </template>
      </el-table-column>
      <el-table-column prop="time" label="音乐时长" >
      </el-table-column>
      <el-table-column prop="audioSrc" label="下载链接" >
        <template slot-scope="scope">
          <el-button type="primary" @click="download(scope.row.audioSrc)">下载</el-button>
        </template>
      </el-table-column>
      <el-table-column label="操作">
        <template slot-scope="scope" >
          <el-button type="success" @click="handleEdit(scope.row)" >编辑<i class="el-icon-edit ml-5"></i></el-button>
          <el-popconfirm
              confirm-button-text='是的我确定'
              cancel-button-text='算了在想想'
              icon="el-icon-info"
              icon-color="red"
              title="您确定删除吗？"
              @confirm="handledelete(scope.row.id)"
              class="ml-5"
          >
            <el-button type="danger" slot="reference">删除<i class="el-icon-delete ml-5"></i></el-button>
          </el-popconfirm>
        </template>
      </el-table-column>
    </el-table>
    <div style="padding: 10px 0;">
      <el-pagination
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
          :current-page="pageNum"
          :page-sizes="[10, 15, 20, 25]"
          :page-size="pageSize"
          layout="total, sizes, prev, pager, next, jumper"
          :total="total">
      </el-pagination>
    </div>


    <el-dialog title="歌曲信息" :visible.sync="dialogFormVisible" width="30%">
      <el-form :model="form"  label-width="80px" size="small">
        <el-form-item label="音乐文件">
          <el-upload
              class="upload-demo"
              drag
              :limit="1"
              :action="serverIp +'/files/upload'"
              multiple
              ref="uploadSrc"
              :on-success="uploadMusic">
            <i class="el-icon-upload"></i>
            <div class="el-upload__text">将文件拖到此处，或<em>点击上传</em></div>
            <div class="el-upload__tip" slot="tip">只能上传mp3文件,将自动识别</div>
          </el-upload>
          <audio
              ref="Ref_audioPlayer"
              :src="form.audioSrc"
              @loadeddata="loadeddata"
          ></audio>
        </el-form-item>
        <el-form-item label="音乐展示图片" >
          <el-upload
              :action=" serverIp +'/files/upload'"
              :limit="1"
              :on-success="handleAvatarSuccess"
              list-type="picture-card"
              ref="uploadImg"
              :on-preview="handlePictureCardPreview"
              :on-remove="handleRemove">
            <i class="el-icon-plus"></i>
          </el-upload>
          <el-dialog :visible.sync="dialogVisible">
            <img width="100%" :src="form.coverImg" alt="">
          </el-dialog>

        </el-form-item>

        <el-form-item label="音乐名称" >
          <el-input v-model="form.name" autocomplete="off" ></el-input>
        </el-form-item>

        <el-form-item label="作者" >
          <el-input v-model="form.author" autocomplete="off" ></el-input>
        </el-form-item>

        <el-form-item label="mv地址" >
          <el-input v-model="form.blblMvSrc" autocomplete="off" ></el-input>
        </el-form-item>


      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="cancel">取 消</el-button>
        <el-button type="primary" @click="save">确 定</el-button>
      </div>
    </el-dialog>


  </div>
</template>

<script>

import {serverIp} from "../../../public/config";

export default {
  name: "Music",
  data(){
    return{
      serverIp: serverIp,
      tableData: [], //分页数据
      total: 0, //总条数
      pageNum: 0,
      pageSize: 10,
      form: {}, //表格数据
      name: "", //查询
      multipleSelection: [], //多选删除
      dialogFormVisible: false, //新增按钮
      dialogVisible: false,
    }
  },
  created() {
    this.load();
  },
  methods:{
    //分页请求
    load(){
      this.request.get("/music/page",{
        params:{
          pageNum: this.pageNum,
          pageSize: this.pageSize,
          name: this.name,
        }
      }).then(res =>{
        if(res.code === "200"){
          this.tableData = res.data.data

          this.total = res.data.total
        }else {
          this.$message.error(res.msg)
        }


      })
    },
    //分页方法
    handleSizeChange(pageSize) {
      this.pageSize=pageSize;
      this.load()
    },
    handleCurrentChange(pageNum) {
      this.pageNum = pageNum;
      this.load()
    },
    //重置搜索框
    reset(){
      this.name = "";
      this.load()
    },
    //新增按钮
    handleAdd(){
      this.dialogFormVisible = true;
      this.form = {}
    },
    //确定新增
    save(){
      if(this.form.audioSrc==""||this.form.coverImg==""){
        this.$message.error("请检查音频或者图片有没有上传")
        return
      }
      this.request.post("/music", this.form).then(res=>{
        if(res.code ==="200"){
          this.$message.success(res.data)
          this.form ={}
          this.dialogFormVisible = false;
          this.load()
          this.$refs['uploadImg'].clearFiles();
          this.$refs['uploadSrc'].clearFiles();
        }else {
          this.$message.error(res.msg)
        }
      })
    },

    //取消按钮
    cancel() {
      this.dialogFormVisible=false
      this.form = {}
      this.load()
    },
    //删除按钮
    handledelete(id){
      this.request.delete("/music/"+id).then(res=>{
        if(res.code === "200"){
          this.$message.success(res.data)
          this.load()
        }else {
          this.$message.error(res.msg)
        }
      })
    },
    //编辑按钮
    handleEdit(row){
      this.form = row
      this.dialogFormVisible = true
    },
    //批量删除多选
    handleSelectionChange(val){
      this.multipleSelection  = val
    },
    //点击批量删除
    delBatch(){
      let ids= this.multipleSelection.map(v => v.id)  //将数组内的id提取出来
      this.request.delete("/music/del/batch",{
        data: ids
      }).then(res=>{
        if(res.code === "200"){
          this.$message.success(res.data)
          this.load()
        }else {
          this.$message.error(res.msg)
        }
      })
    },
    //图片上传方法
    handleAvatarSuccess(res, file) {
      // this.imageUrl = URL.createObjectURL(file.raw);
      this.form.coverImg = res.data;
    },
    //音乐文件上传成功后的回调
    uploadMusic(res, file, fileList){
      let name = file.name;
      let splice = name.split(" – ").length >1?name.split(" – "):name.split("-");
      this.form.name = splice[0]
      let musicauthor = splice[1]
      if(musicauthor.length >= 4 &&  musicauthor.substr( musicauthor.length - 4,musicauthor.length )===".mp3"){
        this.form.author = musicauthor.substr(0, splice[1].length - 4);
      }else {
        this.form.author = musicauthor;
      }
      this.form.audioSrc = res.data
      this.$forceUpdate()


    },
    beforeAvatarUpload(file) {
      const isJPG = file.type === 'image/jpeg';
      const isLt2M = file.size / 1024 / 1024 < 2;

      if (!isJPG) {
        this.$message.error('上传头像图片只能是 JPG 格式!');
      }
      if (!isLt2M) {
        this.$message.error('上传头像图片大小不能超过 2MB!');
      }
      return isJPG && isLt2M;
    },
    loadeddata() {
      // 需等音频加载完成，才能获取到音频的时长
      this.form.time = this.s_to_MS(this.$refs.Ref_audioPlayer.duration);
    },
    s_to_MS(s) {
      let m;
      m = Math.floor(s / 60);
      s = Math.floor(s % 60);
      m += "";
      s += "";
      s = s.length == 1 ? "0" + s : s;
      if (isNaN(m)) {
        return "&infin;";
      }
      return m + ":" + s;
    },
    handlePictureCardPreview(file) {
      // this.form.goodsImgUrl = file.url;
      this.dialogVisible = true;
    },
    handleRemove(file, fileList) {
    },
    //下载连接
    download(url){
      window.open(url);
    },

  }
}
</script>

<style scoped>

</style>